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authorEli Cohen <elic@nvidia.com>2022-01-05 13:46:42 +0200
committerMichael S. Tsirkin <mst@redhat.com>2022-01-14 18:50:54 -0500
commitcd2629f6df1cab5b3df34705ae7f3bde6147fce3 (patch)
treea2a0e3d2426f9ab090d8a30d31e0087296080c22 /drivers/vdpa
parent37e07e705888e4c3502f204e9c6785c9c2d6d86a (diff)
downloadlinux-cd2629f6df1cab5b3df34705ae7f3bde6147fce3.tar.bz2
vdpa: Support reporting max device capabilities
Add max_supported_vqs and supported_features fields to struct vdpa_mgmt_dev. Upstream drivers need to feel these values according to the device capabilities. These values are reported back in a netlink message when showing management devices. Examples: $ auxiliary/mlx5_core.sf.1: supported_classes net max_supported_vqs 257 dev_features CSUM GUEST_CSUM MTU HOST_TSO4 HOST_TSO6 STATUS CTRL_VQ MQ \ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM $ vdpa -j mgmtdev show {"mgmtdev":{"auxiliary/mlx5_core.sf.1":{"supported_classes":["net"], \ "max_supported_vqs":257,"dev_features":["CSUM","GUEST_CSUM","MTU", \ "HOST_TSO4","HOST_TSO6","STATUS","CTRL_VQ","MQ","CTRL_MAC_ADDR", \ "VERSION_1","ACCESS_PLATFORM"]}}} $ vdpa -jp mgmtdev show { "mgmtdev": { "auxiliary/mlx5_core.sf.1": { "supported_classes": [ "net" ], "max_supported_vqs": 257, "dev_features": ["CSUM","GUEST_CSUM","MTU","HOST_TSO4", \ "HOST_TSO6","STATUS","CTRL_VQ","MQ", \ "CTRL_MAC_ADDR","VERSION_1","ACCESS_PLATFORM"] } } } Signed-off-by: Eli Cohen <elic@nvidia.com> Link: https://lore.kernel.org/r/20220105114646.577224-11-elic@nvidia.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Si-Wei Liu<si-wei.liu@oracle.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 60cf821175fa..34fa251db8cc 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -514,6 +514,16 @@ static int vdpa_mgmtdev_fill(const struct vdpa_mgmt_dev *mdev, struct sk_buff *m
err = -EMSGSIZE;
goto msg_err;
}
+ if (nla_put_u32(msg, VDPA_ATTR_DEV_MGMTDEV_MAX_VQS,
+ mdev->max_supported_vqs)) {
+ err = -EMSGSIZE;
+ goto msg_err;
+ }
+ if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_SUPPORTED_FEATURES,
+ mdev->supported_features, VDPA_ATTR_PAD)) {
+ err = -EMSGSIZE;
+ goto msg_err;
+ }
genlmsg_end(msg, hdr);
return 0;